How do I change date of photo in Photos For Mac?

OK, then where in the exif data is the time zone stored? I have an Exif editor but I can't seem to find the time zone information.

The timezone is not necessarily stored in the image files.

See this list of all EXIF tags:

http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/EXIF.html

Photos, Aperture, iPhoto are storing the timezone they are using for an image version in the version in the Photos library. The version is just a set of database entires with the metadata tags and the adjustments to render the image. It is not an image file.

OK, I guess the EXIF Editor I'm using for this isn't thorough enough. Any application you can recommend that I use to edit this for a CR2 File?

I have only used Aperture to correct timezones. It can write the metadata to the originals. But Photos made a mess of the corrected timezones and migrated them incorrectly.

The only tool I know that can write any EXIF tag if it is possible at all is ExifTool by Phil Harvey. You use it from the terminal.

See: http://www.sno.phy.queensu.ca/~phil/exiftool/

I just tried this. Doesn't work for me. Won't allow me to write on the date.

I have 2 photos for example and I am giving them a changed date. Only one changes.Why?

I have been doing this for years in iPhoto, but doesn't work in Photos. So I end up changing EACH picture. Ugh!

Any ideas.

CRAZY FAST! Thanks léonie, it took a few times, but got there finally! 🙂

Great! You're welcome 🙂